A new species of Simaba (Simaroubaceae) from Pará, Brazil,with a key to the species north of the Amazon River

A new species,Simaba cavalcantei, is described and illustrated. It is considered to be intermediate between sectionsGrandiflorae andFloribundae and is distinguished from potentially sympatric species in a key to the species occurring north of the Amazon River.     

A bibliometric investigation of life cycle assessment research in the web of science databases

Purpose

Over the past few decades, life cycle assessment (LCA) methodologies have been developed extensively, and there has been a growing interest in LCA research. However, as attested by scientific literature, few systematic, synthesizing, and visualizing studies have been found on LCA research which show how this field has evolved over time. The goal of this mainly bibliometric, empirical study is to get insight into publication performance of global LCA research, characterize its intellectual structure, and trace its evolution by using the bibliometric method with visual mapping.

Methods

Based on the data from the ISI Web of Science databases Science Citation Index Expanded (SCI-EXPANDED), Social Sciences Citation Index (SSCI), Conference Proceedings Citation Index—Science (CPCI-S) and Conference Proceedings Citation Index —Social Science & Humanities (CPCI-SSH) in the period of 1998–2013, bibliometric methods are used to investigate general development profiles of LCA research, while knowledge domain visualization technologies are employed to conduct a further co-citation analysis.

Results and discussion

The results and discussions of this research mainly shed light on (1) basic statistics of significant publication performances, (2) research focuses and their intellectual base in LCA research, (3) how the streams of research evolved during the whole period of interest.

Conclusions

A new work on systematic and synthesizing study is conducted in this research to evaluate and map LCA research-related context. Some salient scholarly journals and institutions are identified that have shown a significant impact during the exponential growth of LCA research in the past 16 years. Biofuel, process design, solid waste management, and livestock production-related LCA researches are the main areas where interest is surging, confirmed by the active citers in each specialty. Furthermore, from the perspective of science mapping, evolution of LCA research is traced and some pivot publications are identified, which work as structural holes for the LCA-research development in the given time window.     

“Ayahuasca,” the South American hallucinogenic drink: An ethnobotanical and chemical investigation

The Sharanahua and Culina, small Indian tribes located in the southwestern Amazon basin, use a hallucinogenic drink for medicinal and social purposes. This decoction, called “Ayahuasca” in Peru, is prepared from Banisteriopsis Caapi stems and Psychotria sp. leaves. These plants have been botanically identified on the basis of voucher herbarium specimens and investigated for alkaloid content by means of a gas chromatography-mass spectrometry technique. A list of other occasional plant admixtures is given. Harmine, Harmaline, Tetrahydroharmine, Harmol and 6-Methoxytryptamine have been found in Banisteriopsis Caapi. Dimethyltryptamine, Monomethyltryptamine and 2-methyl-1,2,3,4-tetrahydro-β-carboline have been found in Psychotria viridis and Psychotria carthaginensis. Harmine, Harmaline, Tetrahydroharmine and Dimethyltryptamine have been found in the drink. Quantitative calculations show the amount of each alkaloid administered in the Ayahuasca drink.     

House sparrow (Passer domesticus) habitat use in urbanized landscapes

The house sparrow (Passer domesticus) is showing population declines in many parts of Europe, with recent declines being particularly severe in urban areas. To date, relatively little is known about the species’ habitat associations within urbanized landscapes. We report here an investigation of the habitat associations of house sparrows using a survey of 1223 stratified randomly selected 500 × 500-m squares within urbanized landscapes of the UK, defined as at least 25% ‘human cover’. The densities of chirping male house sparrows and of all house sparrows were analysed separately to obtain insights into breeding habitat requirements and general habitat associations, respectively. Multi-model inference showed that residential areas (houses, flats), allotments (areas used for small-scale horticulture) and farm buildings were key predictors of house sparrow density and chirping male density. Separate analyses on landscapes of differing human cover showed similar results. Within residential areas, the increase of house sparrow density with habitat area (on a log scale) was approximately threefold greater when private gardens were present than when they were absent. The model predicted a rapid decline in house sparrow abundance when only a small area of private gardens is converted to continuous housing. Allotments and residential areas with gardens are likely to be under pressure due to increased demand for housing, specifically from the infilling of green space within urban areas. It would seem to be imperative that any action plan to protect urban house sparrow populations should include specific protection of such key habitats. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

Two new species of Rhynchospora section Psilocarya (Cyperaceae)

Two new species ofRhynchospora sectionPsilocarya are described and illustrated.Rhynchospora eburnea is known from Amazonian Venezuela and nearby Brazil whileRhynchospora waspamensis is known only from eastern Zelaya, Nicaragua. These species are distinguished from most of the species of sectionPsilocarya by means of a key to the species found in the Americas south to and including the Amazon Basin.     

Oil and gas projects in the Western Amazon: threats to wilderness, biodiversity, and indigenous peoples

Background

The western Amazon is the most biologically rich part of the Amazon basin and is home to a great diversity of indigenous ethnic groups, including some of the world''s last uncontacted peoples living in voluntary isolation. Unlike the eastern Brazilian Amazon, it is still a largely intact ecosystem. Underlying this landscape are large reserves of oil and gas, many yet untapped. The growing global demand is leading to unprecedented exploration and development in the region.

Methodology/Principal Findings

We synthesized information from government sources to quantify the status of oil development in the western Amazon. National governments delimit specific geographic areas or “blocks” that are zoned for hydrocarbon activities, which they may lease to state and multinational energy companies for exploration and production. About 180 oil and gas blocks now cover ∼688,000 km² of the western Amazon. These blocks overlap the most species-rich part of the Amazon. We also found that many of the blocks overlap indigenous territories, both titled lands and areas utilized by peoples in voluntary isolation. In Ecuador and Peru, oil and gas blocks now cover more than two-thirds of the Amazon. In Bolivia and western Brazil, major exploration activities are set to increase rapidly.

Conclusions/Significance

Without improved policies, the increasing scope and magnitude of planned extraction means that environmental and social impacts are likely to intensify. We review the most pressing oil- and gas-related conservation policy issues confronting the region. These include the need for regional Strategic Environmental Impact Assessments and the adoption of roadless extraction techniques. We also consider the conflicts where the blocks overlap indigenous peoples'' territories.     

Parasitoids and hyperparasitoids ofZeiraphera diniana [Lep., Tortricidae] and their pole in population control in outbreak areas

There are 109 species of primary and secondary parasitoids associated withZeiraphera diniana Guénée in the Central European Alps. Ninety species are primary, 6 facultative secondary and 13 obligate secondary parasitoids. At family level, the composition of the complex seems to be the same in every outbreak area of the host, with ichneumonids predominating. In the Upper Engadine Valley (Switzerland), where intensive studies were conducted over a period of 3 consecutive outbreak periods (28 years), 65% of the complex is represented. The nomenclature ofZ. diniana parasitoids has been clarified as far as possible. Many species names cited in the literature are synonyms or misidentifications. The complex of parasitoids, together with the associated predators ofZ. diniana, is unable to slow down the rate of density increase of the host in outbreak areas. This fact has stimulated investigations on the most important parasitoid species, i.e.Phytodietus griseanae Kerr. (Ichneumonidae), Sympiesis punctifrons Thomson,Dicladocerus westwoodii West. andElachertus argissa Walker (Eulophidae) over a period of about 10 years. Recent research has demonstrated that immigration ofZ. diniana moths into the outbreak areas during the phase of host density increase is very important. The rate of increase of the natural enemies — which are univoltine —can never equal or exceed that of their host; consequently, control by these natural enemies alone is not possible.     

Women as hunters among the matses of the Peruvian Amazon

Matses women of the Peruvian Amazon rain forest hunt with men, and couples bring back more meat than men alone. This results from the association of women with capture of collared peccary, a large catch. Typical Amazonian beliefs about women persist, but some new features (like day care) are pertinent to Matses hunting adaptation.     

Extending the temporal context of ethnobotanical databases: the case study of the Campania region (southern Italy)

Background

Medicinal plants are the integral part of the variety of cultures in Ethiopia and have been used over many centuries. Hence, the aim of this study is to document the medicinal plants in the natural vegetation and home gardens in Wonago Woreda, Gedeo Zone, Southern Nations, Nationalities and Peoples Regional State (SNNPR).

Materials and methods

Thirty healers were selected to collect data on management of medicinal plants using semi-structured interview, group discussion, and field observation. The distribution of plant species in the study areas was surveyed, and preference ranking, direct matrix ranking, priority ranking of factors and Informant consensus factor (ICF) were calculated.

Results

The informants categorized the vegetation into five community types based on plant density and associated landform: 'Raqqa', 'Hakka cadanaba', 'Mancchha', 'Bullukko', and 'Wodae gido'. 155 plant species were collected from the natural vegetation and 65 plant species from the home gardens ('Gattae Oduma'). Seventy-two plant species were documented as having medicinal value: Sixty-five (71%) from natural vegetation and 27 (29%) from home gardens. Forty-five (62%) were used for humans, 15(21%) for livestock and 13(18%) for treating both human and livestock ailments: 35 (43.2%) were Shrubs, 28(34.5%) herbs, 17 (20.9%) trees and 1(1.2%) climbers. The root (35.8%) was the most commonly used plant part. The category: malaria, fever and headache had the highest 0.82 ICF. Agricultural expansion (24.4%) in the area was found to be the main threat for medicinal plants followed by fire wood collection (18.8%). Peoples' culture and spiritual beliefs somehow helped in the conservation of medicinal plants.

Conclusion

Traditional healers still depend largely on naturally growing plant species and the important medicinal plants are under threat. The documented medicinal plants can serve as a basis for further studies on the regions medicinal plants knowledge and for future phytochemical and pharmacological studies.     

Development of uniform density control with self-assembled colloidal gold nanoparticles on a modified silicon substrate

Here, we present a simple method for controlling the density of Au nanoparticles (Au NPs) on a modified silicon substrate, by destabilizing the colloidal Au NPs with 3-mercaptopropyltrimethoxylsilane (3-MPTMS) for microelectromechanical-system-based applications to reduce tribological issues. A silicon surface was pretreated with a 3-MPTMS solution, immediately after which thiolated Au NPs were added to it, resulting in their uniform deposition on the silicon substrate. Without any material property change of the colloidal Au NPs, we observed the formation of large clusters Au NPs on the modified silicon surface. Analysis by scanning electron microscopy with energy dispersive X-ray spectroscopy indicated that the addition of 3-MPTMS resulted in an alternation of the chemical characteristics of the solution. Atomic force microscopy imaging supported the notion that silicon surface modification is the most important factor on tribological properties of materials along with ligand-modified Au NPs. The density of Au NPs on a silicon surface was significantly dependent on several factors, including the concentration of colloidal Au NPs, deposition time, and concentration of 3-MPTMS solution, while temperature range which was used throughout experiment was determined to have no significant effect. A relatively high density of Au NPs forms on the silicon surface as the concentrations of Au NPs and 3-MPTMS are increased. In addition, the maximum deposition of Au NPs on silicon wafer was observed at 3 h, while the effects of temperature variation were minimal.     

Comparative Effects of Hispidulin,Genistein, and Icariin with Estrogen on Bone Tissue in Ovariectomized Rats

Icariin, Genistein, and Hispidulin have been proven to have estrogen-like and antiosteoporotic activity and can be potentially used for the treatment of osteoporosis. The present study found that Icariin, Genistein, and Hispidulin treatments, emulating estrogen, significantly contributed to bone density. Comparative effects of Icariin, Genistein, and Hispidulin with estrogen on in ovariectomized rats were investigated. Our results showed that genistein was found to have superior bone protective effects against osteoporosis among genistein, Icariin, and Hispidulin.     

Censusing primate populations in the reserved area of the Pacaya and Samiria Rivers,Department Loreto,Peru

Four expeditions were made from February 1973 through March 1974 to the Samiria and Pacaya Rivers, which drain the zone between the Lower Ucayali and Huallaga/Marañón, principal constituents of the Amazon. This area is protected as part of the management program for the fishing ofArapaima gigas; however, there has been chronic hunting pressure from poachers, the government's guardians, and sailors, and, recently and most importantly, the petroleum exploration workers. Strip-censusing is extensively discussed. We employed a combination of three techniques: observations from our boat, observations from canoe or on foot, and intensive work in an area with mapped trails (Maldonado Peninsula, Samiria River). The Middle Samiria and Middle Pacaya were faunally the most rewarding. Relatively abundant wereSaimiri sciureus, Alouatta seniculus, probablyPithecia monachus, andSaguinus (probablyfuscicollis illigeri); somewhat less so wereCebus apella (often associated withSaimiri) andC. albifrons; Lagothrix lagotricha required deeper penetration, andAteles is seriously threatened (A. paniscus was seen andA. belzebuth was reported present). Also reported present wereAotus trivirgatus, Cebuella pygmaea, andCallicebus moloch andC. torquatus, though the latter two species may have been confused. Crude density estimates were developed from the Maldonado Peninsula data.     

Chimpanzees of Sapo Forest,Liberia: Density,nests, tools and meat-eating

Two months were spent surveying for chimpanzees (Pan troglodytes verus) in the Sapo Forest, eastern Liberia. The population density, as estimated from the number of nests found on transects, appears lower than that in other forest sites. Nests were more similar to those of other forest-living chimpanzees than of a savannah population. Most nests were found in areas of primary forest. Evidence was found of the chimpanzees using stones as hammers to break open four species of nut; there may be differences in materials and techniques used in this behaviour between Sapo chimpanzees and those in Tai Forest, Ivory Coast. Analysis of faeces revealed that Sapo chimpanzees eat meat.     

Do living ex situ collections capture the genetic variation of wild populations? A molecular analysis of two relict tree species,Zelkova abelica and Zelkova carpinifolia

Botanic gardens and arboreta, particularly in regions where iconic relict trees naturally occur, play a vital role in the conservation of these species. Maintaining well-managed living ex situ collections of rare and threatened relict tree species provides an immediate insurance policy for the future species conservation. The aim of this research was to investigate the origin, representativeness and genetic diversity of relict trees kept in botanic gardens and arboreta. We used as a model two ecologically and biogeographically distinct members of the prominent relict genus Zelkova (Ulmaceae), which survived the last glaciation in disjunct and isolated refugial regions: Z. carpinifolia in Transcaucasia and Z. abelicea endemic to Crete (Greece) in the Mediterranean. Our study revealed substantial differences in the genetic diversity and the origin of living ex situ collections of the two investigated taxa. The living ex situ collections of Z. carpinifolia have relatively high representativeness compared with the global genetic variability of natural stands identified in a previous study. In contrast, Z. abelicea, which possesses an extraordinarily high genetic variability in natural populations, is clearly underrepresented in botanic garden collections. Moreover, all Z. abelicea trees investigated in this study most probably originated from a single region, the Levka Ori in western Crete. Thus, the ex situ conservation of Z. abelicea requires major planning and coordination efforts, including the establishment of well-documented collections in botanic gardens in Greece and especially on Crete. New living ex situ collections should be created using plant material collected from all of the mountain regions where Z. abelicea still occurs. Our study highlights the need for re-evaluating the existing living ex situ collections of trees and the development of new strategies for future conservation efforts in botanic gardens and arboreta. The coordination of conservation efforts between gardens must be enhanced to prioritize actions for the most threatened relict tree species.     

Plants and environment: Two decades of research at the Canberra phytotron

The research carried out at the Canberra phytotron, CERES, during the first twenty years of its operation is reviewed as a case study of the opportunities, problems and value of phytotron research. The climatic responses of a large number of species, both wild and domesticated, are examined as well as those of fungal and viral pathogens and rhizobial symbionts. Some aspects of the design of CERES are briefly considered, and a few aspects of the variation between plants in climatic response, with the C₄ photosynthetic syndrome taken as a case history of the linkages between biochemistry, anatomy and response to climate. Research in ecology, forestry, horticulture, plant pathology, rhizobial microbiology, anatomy and ultrastructure—and specific aspects of biochemistry, plant nutrition and genetics—are reviewed to indicate the range of botanical disciplines which can profit from access to a phytotron. The ecological research at CERES, much of it with trees and perennial grasses, particularly highlights the value of combining field and phytotron studies. Work on seed proteins, hybrid vigor and plant growth regulators is also reviewed. The next part of the paper considers the effects of the major environmental factors, temperature, daylength, irradiance, atmospheric CO₂ level and water stress, together with their interactions and the problems of correlating phytotron and field responses. The effect of these factors on the various processes of growth and development are considered, and the stages of development most sensitive to them. An evolutionary perspective on yield potential is then discussed, leading to a consideration of photosynthesis, translocation, partitioning and storage organ growth as yield-determining processes. The final part considers the uses of phytotrons in agricultural, horticultural and forestry research, in terms of examples from work at CERES on the manipulation of breeding systems, the clarification of plant breeding objectives, the use of phytotron conditions for selection, the prediction of adaptation and spread, and models for yield prediction and pest management. Several areas requiring more attention are identified, and some conclusions are drawn on the value of access to a phytotron such as CERES for botanical research of many kinds.     

The epidemiological transition and the risk factors for non-insulin-dependent diabetes mellitus (NIDDM) in «Punjabi» population of north India

The prevalence of NIDDM in the «Punjabi» population from north India corroborates the «epidemiological transition» model. Hospital admittees gave a higher prevalence of NIDDM in urban areas (8.2–9.3 percent), as compared to rural areas (2.4 percent), and this difference probably is the outcome of the respective lifestyles. Moreover, urban residents are 3.7 times more likely to develop diabetes than are rural residents. Principal component analysis suggests a high correlation of NIDDM with age, BMI, systolic and diastolic blood pressure. The combined relative risk of diabetes with hypertension as a risk factor was 5.16 (p<.0001). Findings indicate that a combination of risk factors show significant association with diabetes.     

Tunable Extraordinary THz Transmission Using Liquid Metal-Based Devices

In this paper, we report novel designs of tunable THz plasmonic devices based on liquid metals. The designed devices will be able to dynamically control and change the spectrum responses of extraordinary THz wave transmissions. Different THz device configurations are investigated, and numerical simulations have been conducted to theoretically verify the performance of the proposed structures. Moreover, an equivalent circuit model has been developed to describe the operating principle of the proposed THz devices. Good agreement has been achieved between the theoretical models and the numerical results. These new THz devices are expected to be applied in various areas of sensing, communication, and imaging.     

Distributions of C4 plants along environmental and compositional gradients in southeastern Arizona

Distributional patterns of C₄ plants were investigated in 4 study areas located in se Arizona: granite slopes in the Mule Mountains, limestone slopes in the Mule Mountains, calcareous bajada (alluvial plain) below the Mule Mountains, and limestone slopes in the Huachuca Mountains. Cover data for all vascular species were obtained from 238 0.1 ha (20×50 m) sample quadrats located over ranges of elevation and topographic position within the study areas. Overall, 69 C₄ species representing 6 angiosperm families were encountered. C₄ species accounted for 13.5% to 22.3% of vascular species within the study areas. C₄ species frequency in quadrats (on the basis of all species or of grasses only) increased from mesic to xeric community types in all study areas except the calcareous bajada. Similar, but less consistent, trends were evident in the relative cover contributed by C₄ species. In two of the study areas (granite slopes in the Mule Mountains, limestone slopes in the Huachuca Mountains) regression analyses revealed statistically significant trends of C₄ species frequency and relative cover along environmental (elevation/solar-irradiation scalar) and compositional (reciprocal averaging ordination) gradients. A lack of consistent trends on limestone slopes in the Mule Mountains may be the result of grazing and/or recent invasion of low-elevation limestone areas by a Chihuahuan Desert flora dominated by C₃ dicot shrubs. The calcareous bajada below the Mule Mountains was studied less intensively, but its flora was found to contain the highest frequency of C₄ species of the 4 study areas. In contrast, C₄ cover on the bajada was low, presumably as a consequence of heavy grazing pressure on the grasses. The results of the present investigation support the prediction that C₄ species should be proportionally more successful in habitats characterized by high temperatures, high irradiance and low moisture.     

Applying Imaging Genetics to ADHD: the Promises and the Challenges

Attention deficit/hyperactivity disorder (ADHD) is one of the most prevalent childhood psychiatric disorders. During the past decades, studies have focused on its genetic background and the abnormality of the brain structure and function. Recently, an advanced technique linking these two areas, namely, the imaging genetics emerged and kept growing. Imaging genetics primarily identifies genes that influence the brain variations. There are three main strategies of doing an imaging genetic study: using neuroimaging as endophenotypes to find the associated DNA variants, finding neuroimaging effects of risk genes, and hypothesis-free whole-brain voxelwise genome-wide association study. In this review, we begin with demonstrating the basic principles of imaging genetics precisely, with examples from other psychiatric conditions, and then go on to synthesize the existing imaging genetic studies in ADHD. Finally, we elaborate the challenges of applying imaging genetics to ADHD. We conclude that imaging genetics has somewhat showed its potential to provide a more precise understanding of how the genes shape the brain variations and further the clinical features of ADHD.